摘要:
A waveguide optical switch has a waveguide whose refractive index changes can be controlled by an electro-optic effect and an UV guide waveguide for coupling an ultraviolet radiation to the waveguide. A portion of the waveguide and a portion of the UV guide waveguide make up a directional coupler.
摘要:
In order to obtain a temperature insensitive optical waveguide which is formed on a substrate and comprises a core and a cladding whose refractive index is less than that of said core, the substrate has a zero or negative coefficient of thermal expansion in the range between 0° C. and 65° C.
摘要:
An image data management system includes a communication circuit network, and an image data input output apparatus and an image data registration apparatus connected to this communication circuit network. The image data output apparatus includes an image input device for taking in information represented on paper as image data, a management information input device for reading image data management information from a portable memory device, the image data management information being needed to register and manage image data inputted from the image input device, an input device for inputting command information given by a user, and an input output processing device for processing image data inputted from the image input device and sending processed image data onto the communication circuit network, on the basis of the command information inputted from the input device and the image data management information read from the management information input device. The image data registration apparatus includes a memory device for registering image data sent from the image data input output apparatus, and an image data registering device for taking in image data on the communication circuit network, providing image data thus taken in with search information needed at the time of searching the image data, and registering the image data with the search information attached thereto in the memory device.
摘要:
In a data dictionary directory system, the definition information to be registered in a dictionary is registered being divided into several definition units. A data base system registers the definition information and confirms the coordination of the contents of definition among the definition units. The definition information is registered without confirming the coordination. The coordination is confirmed when it becomes necessary to confirm the coordination among the definition informations registered in the dictionary.
摘要:
In a database system having a dictionary/directory for collective management of definition information of the database system, when an application program is compiled to generate an object module, it is confirmed, by referring to the definition information stored in the dictionary, if a database access instruction in the application program is correctly operable. The confirmed definition information is incorporated within an object module which is edited to generate a load module. During execution of the load module, a database access control is effected using the definition information of the database system in the directory as well as the definition information incorporated at the compiling stage.
摘要:
In an arrayed waveguide grating, a wedge-shaped groove formed in an arrayed waveguide section or a silica-based waveguide section in a periphery of the groove is modified in either one of the procedures below or in a particular combination thereof to suppress spreading of light in the groove to thereby reduce the excess loss due to addition of the groove. The material filled in the groove is a photosensitive material having a negative refractive index temperature coefficient. Using the photosensitivity, refractive index difference is provided in the groove to form optical waveguides in a horizontal direction or in vertical and horizontal directions. The material filled in the groove has a negative refractive index temperature coefficient to minimize a spreading angle of light incident to the groove. Width of each silica-based waveguide is enlarged before and after the groove to decrease the spreading angle of light incident to the groove. This method reduces the excess loss of the arrayed waveguide grating in which a wavelength characteristic is kept unchanged with respect to a change in ambient temperature.
摘要:
In an arrayed waveguide grating device, two or three components are joined to each other in joint face in any one of or both an input-side slab waveguide and an output-side slab waveguide. In this case, the joint faces are joined to each other in such a state that the joint faces have been relatively moved by a desined degree. By virtue of this construction, an arrayed waveguide grating device, a process for producing the same, and an arrayed waveguide module and an optical communication system using the arrayed waveguide grating device can be realized wherein the joint faces can be fixed to each other at an optimal position to facilitate wavelength correction and the third component for constituting the output-side slab waveguide can be properly selected and joined, for example, to realize increase the number of output-side channels or to provide a monitoring output terminal.
摘要:
An upper electrode and a lower electrode are disposed opposite to each other in a process container configured to be vacuum-exhausted. The upper electrode is connected to a first RF power supply configured to apply a first RF power for plasma generation. The lower electrode is connected to a second RF power supply configured to apply a second RF power for ion attraction. The second RF power supply is provided with a controller preset to control the second RF power supply to operate in a power modulation mode that executes power modulation in predetermined cycles between a first power set to deposit polymers on a predetermined film on a wafer and a second power set to promote etching of the predetermined film on the wafer.
摘要:
An image data recording apparatus includes an area producing device producing a plurality of areas on a recording medium, an initialization device initializing the areas produced by the area producing device in accordance with desired forms, an area production designating device causing a user to designate a number of the areas produced by the area producing device and a recording capacity of each of the areas, and a format designating device causing the user to designate a kind of a format of each of the areas produced by the area producing device.
摘要:
Initialization information including the number of areas to be produced on a recording medium, the capacities of the respective areas, and the types of the formats is produced. The recording medium is initialized in accordance with the initialization information. The initialization information is saved after the initialization processing. The saved preceding initialization information is exhibited to a user as one of the choices of initialization methods at the time of the next initialization of the recording medium.